Buttonhole cutter or shears.



GEORGE T. BARR, OF WAGO, TEXAS.

BUTTONI-IOLE CUTTER OR SHEARS.

Specification of Letters Patent.

Application filed. October 16, 1907.

Patented March 17, 1908.

serial No. 397,710.

To all whom 'it may con/cern:

Be it known that I, GEORGE T. BARR, a citizen vof the United States,residing at Waco, in the county of McLennan and State of Texas, haveinvented certain new and useful Improvements in Buttonhole Cutters orShears, of which the following is a specifica-v tion, reference beinghad to the accompanying drawings.

My invention relates to improvements in button hole cutters or shearsand more particularly to an improved adjustable stop device forregulating the cutting action of the blades whereby button holes ofdifferent lengths may be cut.

The object of the invention is to provide an adjustable stop orregulating means of this character for the pivoted arms or members ofbutton hole cutters, shears and similar instruments or tools, which willbe simple and inexpensive in construction, strong and durable 'in useand convenient and easy to operate. With the above and other objects inview, the invention consists of the novel features of constructionhereinafter described and claimed, and illustrated in the accompanyingdrawings, in which Figure 1 is a perspective view of a button holecutter provided with my improved stop device; Fig. 2 is a frontelevation of the same, parts being in section; Fig. 3 is a detailsection taken on the plane indicated by the line 3--3 in Fig. 2 and Fig.4 is a detail section taken on the plane indicated by the line 4-4 inFig. 3.

In the drawings 1 denotes a button hole cutter or shears of well knownform consisting of two arms 2, 3, pivotally connected at 4 and havingfinger pieces or loops 5 at one end and co-acting cutting blades 6 atthe opposite end. The blades 6 are of the usual form and are preferablyarranged at right angles to the plane. of the arms or members 2, 3, sothat vertical button holes or button holes which are parallel with theedge of the button hole fia may be conveniently and easily cut as wil bereadily understood.

My improved means for varying and limiting. the cutting action of theblades comprises a stop screw 7 and an operating wheel 8. These partsare arranged in an enlarged portion 9 which is formed upon the inneredge of the arm 2 and adapted to enter a similar shaped recess 10 formedin the corresponding portion o'f the other member 3,

when the two parts are brought together to close the blades. In theenlargement 9 is formed an angularly arranged notch or slot 10a adaptedto receive the wheel 8 so as to allow the latter to rotate freelytherein. In said portion or enlargement 9 is also formed an angularlyarranged hole oropening 11 which intersects the slot 10 adjacent to itscenter and which has its inner portion screw threaded as at 12.

The aperture or opening 11 is adapted to receive the screw 7, thethreads of which engage the threads 12 in said opening as clearly shownin Fig. 2. Upon one or more points on the stop screw are formedlongitudinally extending iiat faces 13 adapted to be engaged by similarfiat faces formed in an aperture 14 in the wheel through which aperturethe screw projects and in which it is adapted to freely slide. Theprovision of the flat faces 13 on the screw and the elongated apertureor opening 14 in the wheel causes the screw to turn with the wheel andat the same time slide longitudinally therein as it travels through theaperture or opening 11. The wheel 8 has its periphery milled as shown at15 and its diameter is greater than the width of the armor member 2 sothat it projects beyond the opposite faces of the latter and may bereadily-rotated between the thumb and the first finger. In order toprevent the screw from being turned or run out of the aperture 11 I heador upset its ends as shown at 16.

In use the stop screw 7 is first adjusted by rotating the wheel 8 andthe device is then taken in hand and manipulated in the usual manner. Byrotating the wheel in one direction the screw may be moved inwardly andin the opposite direction` it may be moved outwardly so that its innerend may be positioned at a greater or less distance from the inner edgeof the arm or member 2 to limit the movement of the other arm or member3 toward it and hence to limit the closing movement of the blades 6.

From the foregoing it will be seen that the construction disclosed isexceedingly simple so that it may be produced at a comparatively smallcost and will be durable in use and convenient to operate. The stopscrew may be readily adjusted by simply rotating the wheel which can bequickly and easily done.

While I have shown and described my invention as applied to a buttonhole cutter, it

will be understood that it may be applied to a pair of shears, scissorsor a similar instrument or tool in which it is desired to limit theclosing movement of its arms or members.

Having thus described my invention what I claim is:

In a device of the character described, the combination of a pair ofpivotally connected arms or members, one being formed in its inner edgewith a slot and with an intersecting opening, the latter having a screwthreaded portion, a stop screw arranged in said opening and engaged withthe threaded portion of the same and formed with longitudinallyextending flattened portions or faces, a Wheel arranged in said slot andhav- GEORGE T. BARR. Witnesses G. B. GURLEY, J. M. BRECKINRIDGE.

